Common Room

The common room is a circular room where Gryffindor students can relax after a long day of studying. It is full of squashy armchairs, tables, and a bulletin board where school notices, ads, lost posters, etc. can be posted. A window looks out onto the grounds of the school, and a large fireplace dominates one wall. The walls are decorated with scarlet tapestries that depict witches and wizards, but also various animals. It is usually where celebration

Dormitories

The entryways to the dormitories

The Gryffindor dormitories are also located in the Tower, with two doors leading off from the common room that open to spiral staircases. One of them leads to the girls' dormitory, the other to the boys'. The stairs to the girls' dormitory are enchanted to become a slide if any boy attempts to climb them, but not vice versa, since it was deemed that girls were more trustworthy than boys, and Hermione Granger went into the boys' room on several occasions.

The charm used to make the Girls' Dormitory stairs into a slide may be the Glisseo charm. It is never stated if similar enchantments are placed on the entrances to the Girls' Domitories in other houses, but is highly likely, as Hermione identifies the Founders collectively as the ones responsible for the charm.

In the PS2 video game adaptation of Chamber of Secrets, after going through the portrait-hole, there is a short stone hallway leading to the actual common room. This hallway also leads to an old room behind a tapestry, a quiet study area for Gryffindor students, frequently used by Percy, and a secret bathroom used by Fred and George Weasley as an in-school joke shop.

The Chamber of Secrets video game is also the only place in the games or the films where the common room is accessed by crawling through an actual hole (albeit a square-shaped one). All other adaptations depict a doorway.